You asked
What lenses should I buy for the fujifilm x t30?
For an everyday kit on the X-T30, I'd start with the Fujifilm XF 18-55mm f/2.8-4 R LM OIS. It covers wide to standard, and its optical stabilisation matters because the X-T30 has none in the body.
If you want one lens for travel, the Fujifilm XF 16-80mm f/4 R OIS WR covers most situations, though it's slower at the wide end.
For a small, sharp prime that's easy to carry, the Fujifilm XF 35mm f/2 R WR is my favourite on this body. It frames roughly like a 52mm lens on full frame, which suits everyday street and portrait work.
If you shoot people or sport and want more reach, look at the Fujifilm XF 50-140mm f/2.8 R LM OIS WR.
Written by Claude from this site's pages.